4 1/4 grip size

 Comes with an aerodynamic shape of the frame with a modern, new precision groove engineered into the racquet frame under the grommet strip. Enlarge the sweet spot thanks to a new grommet structure that increases string movement. Hit with more power and more comfort. Dunlop also added "Flex Touch Resin," a new material with a unique high-performance thermoplastic elastomeric compound, creating high elasticity & vibration damping properties.